Improvement in machines for forming metallic sieve-bodies



R. J. MANN.

Improvement in Machines for Forming Metallic Sieve-Bodies.

No. 130,512, Patented Aug. 13, I872.

' lllllllllllilllllillll Minn Witnesses:

@ flaw) UNITED STATES PATENT OFFICE;

ROBERT J. MAN v, on RuRLnvGTon, IQWn-i .IMPROV EMEN T IN MACHINES FORFORMING METALLIC SlEVE-BODIES.

Specification forming part of Letters Patent No. 130,512, dated August13, 1872.

SPECIFICATION.

ters and figures marked thereon, form part of this specification, and inwhich Figure 1 is a front elevation of my invention, and Fig. 2 is anend elevation of the same, taken at the left of Fig. 1.

Like letters of reference made use of in the several figures indicatelike parts.

' Nature of the Invention;

In the manufacture of sieve-bodies for metallic-bodied sieves, inaccordance with the several patents heretofore granted to me forimprovements in metallic-bodied sieves, No. 106,597, No. 113,184, No.117,790, and No. 122,728, it is necessary that the bottom edge of themetal sides should be turned in to form an angle to the sidespreparatory to applying and fixing by a swagin g process the wire gauzeor net to the sieve-bottom; and it is desirable that the upper edgeshould be wired to strengthen and stiffen the body; and this inventionrelates to a machine for preparing the metal-sieve bodies to receive thewire-gauze or sieve-cloth by bending the bottom edge into the desiredpreparatory shape, and which machine, at the same time and by the samerevolution, incloses an annular wire in a previouslyformed swage at theupper edge. of the sieve body; and the invention consists in thecombination and arrangementof the various parts, more explicitlyhereinafter described and claimed.

To enable those skilled in the art to make and use my invention, I willproceed to describe the same with particularity, making use in so doingof the aforesaid drawing by.

letters of reference thereto.

General Description.

A is a substantial frame-work constructed to sustain the mechanism andelevate it to a convenient height. B is a revolving form supported upona pillar, O, resting upon the framework A. This form is made of a shapeto correspond to the body of the sieve, and has around its lowerperiphery an annular groove or gutter, D, and is made at the top with acorrugated surface, E, the corrugations radi- .ating from the center. Fis a miter cog-wheel carried upon the form B below, and meshing into thevertical mitered cog-wheel G upon the shaft H, which is provided at itsouter extremity with the crank-wheel I and handle J. By this mechanismthe form B may be revolved by the hand of the operator applied to thehandle J. K is a corrugated wheel meshing into the corrugated uppersurface of the form B. This wheel K is carried upon the shaft L havingbearings in the support M. The shaft L is fitted to slide in itsbearings, and the wheel K is held, when other pressure is removed, inthe position indicated by the dotted lines, by means of the spring N. Abell-crank lever, 0, connected to the treadle P, serves to throw thewheel K in and out of gear. Q is a bell-crank lever pivoted to theframe-workA and attached to the treadle P. This lever, upon its freeend, carries the beveled grooved pulley or roller R, arranged to engagethe metal of the sievebody at apoint over the groove D. When the treadleis raised this roller and lever is held by the spring S in the positionindicated in dotted lines.

The operation is as follows: The sieve-body,

made of metal, generally of tinned iron, is first I joined into anannular band by a side seam,

and the upper edge turned outward and downward to form a groove toreceive the strengthening-wire. The body, in this condition, is placedon the form B with the groove resting in the groove D of the form. Anannular wire of proper length is placed within the groove of thesieve-body and the treadle P brought down. This brings the wheel Kagainst the metal projecting above the top of the form, and it isbent'over, and at the same time the roller R descends against the metalof the sieve-body at. the groove. The form is now revolved, and thewheel K and roller B press down the tin or metal and inclose the wireand form the bent lower edge. The wheel K and upper surface of the formB are made corrugated, so that the metal will be taken up by thecorrugations and the bend accomplished without danger of breaking theedges. When the work is done the treadle is released, and the springsthrow back the wheel K and roller B so that the sieve-body may bereadily removed.

Claim.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

The form B, arranged to revolve, and having acrimped or corrugated uppersurface, E, and the gutter D, in combination with the wheel K roller R,and a mechanism for removing and applying them to the form,substantially as specified.

ROBT. J. MANN. Witnesses:

JOHN W. MUNDAY, HEINR. F. BRUNS.

